Anyone running just the 13# hammer spring

[Stafford]

I have a Shadow 2 and an SP-01 manual safety - both completely stock. Thinking about trying a 13# spring. Anyone running just the spring without the extended firing pin/spring?

I only run factory ammo. Usually S&B, but sometimes Magtech, or Fiocchi.

[2morechains]

13 lb mainspring with everything else stock will probably run fine, even the harder primers like S&B.  However why not have the extra peace of mind by adding the extended firing pin and reduced FP spring? 

I run a 11.5 lb CGW main spring w/ the extended FP and spring.  Ignites everything I’ve tried including CCI and S&B primers. 

[SoCal]

I have a Shadow 2 and an SP-01 manual safety - both completely stock. Thinking about trying a 13# spring. Anyone running just the spring without the extended firing pin/spring?

I only run factory ammo. Usually S&B, but sometimes Magtech, or Fiocchi.

X2

Never had a problem with just the #13 spring, now I have an 11.5# spring and ext. FP, etc. and I love it.

[Stafford]

Ran the Shadow 2 and SP-01 with just the 13# hammer spring this morning. 100 rounds for each with S&B 115 grain. No problems.

[LeeM]

Does the 11.5# spring have any downsides? I’m buying the CGW spring kits for IDPA matches and trying to decide whether the ultra lite or defensive kits are better.

[MadDuner]

Springs are cheap.... experimentation is fun.

[timetofly]

Springs are cheap.... experimentation is fun.

I agree!

[Hammer Time]

I've been running the #13 hammer spring in my SP-01 for about a year now, installed with CGW's 3-spring kit (SPGK 1). I opted not to install the extended firing pin at the time, and I've had zero issues since, with over 1,000 rounds of various target ammo through it.

[LeeM]

Springs are cheap.... experimentation is fun.

And just like that, I have them on order. Thanks!

[Mercs]

I have CZC spring kit for sale in the classifieds if you want to save money [emoji6]


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[2morechains]

Does the 11.5# spring have any downsides? I’m buying the CGW spring kits for IDPA matches and trying to decide whether the ultra lite or defensive kits are better.

Only downside to the 11.5 spring that I know of is it’s recommended that you also swap out your firing pin and FP spring for the extended pin and reduced weight spring.  This will help ensure you get reliable primer ignition with even the harder primers such as CCI or some of the eastern imported primers. 

[MadDuner]

My P-07 did not like a 11.5# spring. 
I run a 13# in it now.  No issues.

My SP-01 and P-01 both functioned fine with 11.5# springs.
I went to 13# on them to keep all of my CZs with the same trigger “feel”.
And that’s especially true on that first DA pull.

The closer I can keep them to feeling the same, the the better I feel about them.

[Hammer Time]

My P-07 did not like a 11.5# spring. 
I run a 13# in it now.  No issues.

My SP-01 and P-01 both functioned fine with 11.5# springs.
I went to 13# on them to keep all of my CZs with the same trigger “feel”.
And that’s especially true on that first DA pull.

The closer I can keep them to feeling the same, the the better I feel about them.

Curious - did you install the extended firing pin, or are you running the #13 with the standard FP?

[MadDuner]

I installed the extended firing pin.
It would FTF on every 4th or 5th round whether it was my reloads or factory stuff.

[spt_1955]

I ran the 13# spring with no other changes for 6 months and it was very nice.  No primer ignition issues at all for ~1100  rounds.  I recently upgrade with the Cajun 54440 Ultra Lite kit (Hammer springs and extended firing pin) and have run it with both the 8.5# hammer spring and the 11.5# hammer spring.   The 8.5# produces a DA pull of 4.5#-4.8# and has ignited over 400 handloads using Federal SPP and Federal SPP Match primers with no failures.